EP0082268B1 - Dispositif pour l'électroplacage des rouleaux d'impression - Google Patents

Dispositif pour l'électroplacage des rouleaux d'impression Download PDF

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Publication number
EP0082268B1
EP0082268B1 EP82109855A EP82109855A EP0082268B1 EP 0082268 B1 EP0082268 B1 EP 0082268B1 EP 82109855 A EP82109855 A EP 82109855A EP 82109855 A EP82109855 A EP 82109855A EP 0082268 B1 EP0082268 B1 EP 0082268B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
printing cylinder
contact member
current
clamping element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82109855A
Other languages
German (de)
English (en)
Other versions
EP0082268A1 (fr
Inventor
Karl Saueressig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saueressig GmbH and Co KG
Original Assignee
Saueressig GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saueressig GmbH and Co KG filed Critical Saueressig GmbH and Co KG
Priority to AT82109855T priority Critical patent/ATE18779T1/de
Publication of EP0082268A1 publication Critical patent/EP0082268A1/fr
Application granted granted Critical
Publication of EP0082268B1 publication Critical patent/EP0082268B1/fr
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/005—Contacting devices
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/04—Tubes; Rings; Hollow bodies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/64—Devices for uninterrupted current collection

Definitions

  • the invention relates to a device for electroplating a rotary printing cylinder, which has a current-carrying rotary drive which is connected to a power source and to which the printing cylinder is connected via an axial tensioning element, the latter being at least partially immersed in a galvanizing bath as a cathode while rotating.
  • Such a device for electroplating a rotary printing cylinder is known from the relevant practice. It is common that the rotary drive is equipped with an output shaft, which is provided at the end receiving the stub shaft of the pressure cylinder with a conically tapering, cylindrical bore, similar to a drilling or milling spindle, the conical course of the bore for receiving an annular cone provided with an outer cone is used, the inner bore of which is fitted with a snug fit on the stub shaft of the pressure cylinder.
  • the conical ring tensioning element is elastically tensioned by an axial tensioning element which is passed through a central bore of the shaft and screwed to the axle stub, so that it forms a tight fit with the axle stub.
  • the shaft of the rotary drive is otherwise provided at the opposite end with a slip ring which is connected to the negative pole of a direct current source via carbon brushes.
  • the flow of current from the shaft into the pressure cylinder takes place to a lesser extent via the metallic tensioning element, and to a greater extent via the ring tensioning element onto the stub shaft of the pressure cylinder.
  • a current-carrying cylindrical sleeve which is equipped with a slip ring at its rear area, is arranged concentrically with the clamping element in front of the pressure cylinder, and that the sleeve with its end face by means of resilient tension is applied by the clamping element to an annular contact element, which in turn is connected to the end face of the printing cylinder directly or for the purpose of compensating for different diameters of the sleeve and the printing cylinder via a rotationally symmetrical intermediate piece and a further annular contact element.
  • the cylindrical sleeve results in a current conductor with a relatively large power line cross section, which introduces the current with the least possible resistance into the pressure cylinder due to the interposition of the special ring-shaped contact element, whereby resistance losses and harmful heating are avoided.
  • the invention saves up to 30% of electrical energy or achieves significantly better galvanization performance.
  • the contact element be made from an elastic and / or plastically deformable metal having the lowest possible electrical resistance value.
  • the metal from which the contact element is made is expediently pure copper, silver, silver alloy, lead or a metal with comparable mechanical and electrical properties.
  • the line resistances at the transition point are advantageously minimized as far as possible.
  • the sleeve rests with the interposition of at least one annular contact element on the end face of the printing cylinder.
  • the clamping element is designed as a spring element or is equipped with such.
  • An uncomplicated centering between the pressure cylinder and the rotary drive is achieved in a pressure cylinder with a stub axle stub in that annular centering bodies are fitted between the stub shaft and the sleeve surrounding the stub shaft.
  • centering bodies in contrast to the ring tensioning element, are arranged outside the current supply, they can be equipped with much more generous tolerances and therefore require a significantly lower amount of work both in manufacture and in assembly.
  • a further proposal provides that a rotationally symmetrical between the sleeve and the end face of the printing cylinder Intermediate piece is arranged to compensate for different diameters, and that a contact element is arranged between the sleeve and the intermediate piece and between the intermediate piece and the pressure cylinder.
  • the sleeve on the end face receiving the contact element has an annular groove with obliquely converging flanks, and that the contact element has a semicircular bead in cross section.
  • the current transfer area of the sleeve and pressure cylinder is covered with a protective sleeve made of elastic material.
  • the sleeve is equipped with a radial lip seal made of elastic material at the point of passage through the container wall of the electroplating bath.
  • a device from the prior art for electroplating a rotary printing cylinder according to FIG. 1 shows the printing cylinder 1 with the front axle stub 2.
  • the rotary drive 3, which receives the printing cylinder 1, comprises the shaft 4, at the rear end of which the slip ring 5 is pressed on. which produces the conductive connection to the shaft 4 via the resilient carbon brushes 6 with the negative pole of a DC power source 41 (not shown).
  • the slip ring 5 is made of copper, while the shaft 4 is usually made of steel.
  • This has a central bore 8, which receives a clamping element 9 in the form of a bolt, the threaded end 10 of which is firmly screwed to the stub shaft 2 of the pressure cylinder 1.
  • the bore 8 is widened in the direction of the stub shaft 2 to a larger bore 11 which widens against the pressure cylinder 1 with a conical outlet 12.
  • the ring clamping element 13 is arranged, which is initially pushed over the bearing seat 26 with a slight snug fit and is contracted as a result of tensioning with the conical outlet 12 of the shaft 4 by the clamping element 9, that it connects between the bearing seat 26 and the conical outlet 12 with a tight fit.
  • the conical outer jacket of the ring tensioning element 13 usually has to be spherical. The consequence of this is that only a line contact takes place between the conical outlet 12 and the outer jacket of the ring clamping element 13, which considerably reduces the electrically conductive cross section at this point.
  • a direct current source 41 produces a galvanization current of low voltage, e.g. B. 12 V, with a high current density through the carbon brushes 6 and the slip ring 5 flows through the shaft 4 in the stub shaft 2. A partial flow of this reaches the stub shaft on the way via the clamping element 9, while the major part of the current flow flows through the shaft 4 via the ring clamping element 13 into the bearing seat 26 of the stub shaft 2.
  • a protective tube 18 made of plastic which is axially clamped against the end face 21 of the pressure cylinder 1 by a clamping ring 20 is pressed and with the help of the annular soft seal 19 sealingly abuts the end face 21 of the printing cylinder 1.
  • the rotary drive 3 includes the sleeve 14, which is firmly connected to the shaft 4 by means of shear bolts 17, and which in turn carries the bearing 15 and the drive wheel 16.
  • the electroplating bath 25 is located in the trough 29.
  • the disadvantage is a high resistance to the current flow, in particular at the line contact between the inner flank of the conical outlet 12 and the crowned one Outer flank of the ring tensioning element 13, which, after constant operating experience, results in considerable heating from the electrical resistance, which in some cases even leads to harmful structural changes in the stub axle 2. This also resulted in a considerable power loss when feeding the electrical energy, which adversely affected the economy of the electroplating process.
  • FIG. 2 A similar arrangement from the prior art, which has become known in practice, is shown in FIG. 2.
  • the printing cylinder 1 is not equipped on its end face 21 with an axle stub, but with a welded-in head piece 30, which is used for clamping onto a working shaft of a rotary printing press has conical bore 31.
  • a welded-in head piece 30 which is used for clamping onto a working shaft of a rotary printing press has conical bore 31.
  • an intermediate piece 32 with ends 33 and 34 which are conical on both sides between the shaft 4 of the rotary drive 3 and the pressure cylinder 1, and this together with the shaft 4 by means of a continuous tensioning element 9 in the form of a long threaded rod.
  • the device according to FIG. 3 has the sleeve 40 for receiving the printing cylinder 1 and for introducing the current, which sleeve is provided on its rear area 40 'with the copper slip ring 5, which is in conductive contact with the carbon brushes 6 shown purely schematically with a hint connected by the arrow symbolized current source 41.
  • the sleeve 40 which accordingly represents a current conductor of a relatively large line cross section, is connected at its other end 44 with its end face 45 via a contact element 43 to the end face 21 of the pressure cylinder 1 and is clamped against the pressure cylinder by the tensioning element 42 under relatively high elastic tension 1 braced.
  • this arrangement is not only considerably less complicated, but also ensures unimpeded operation Flow of the electrical current to be introduced without any reduction in the conductive cross section from the current source 41 to the end face 21 of the printing cylinder 1.
  • the contact element 43 which is firmly clamped between the end face 45 of the sleeve 40 and the end face 21 of the pressure cylinder 1 in the form of a relatively large-caliber ring made of a highly conductive metallic material due to its elastic and / or plastic deformability, ensures optimum contact and accordingly low contact resistance between the sleeve 40 and impression cylinder 1.
  • the tensioning element 42 is either, as in the example shown in FIG. 3, designed as an expansion bolt which has the effect of a spring element with a high level Progression achieved, or even better equipped with a spring arrangement, as shown in Figure 6, wherein the arrangement of a spring element 47 is provided between the clamping element 42 and the clamping plate 46 which provides the counterhold. It is at the skilled person's discretion to provide two clamping plates with an elastic intermediate layer made of rubber or an elastic plastic instead, etc.
  • the sleeve 40 is guided concentrically about the axis of rotation 28 of the shaft 4 by two centering bodies 48 and 49. Furthermore, the sleeve 40 is inserted into the hollow shaft 50, which forms part of the rotary drive 3, and is connected to the bearing 51 and the drive wheel 52.
  • FIG. 4 shows the sleeve 40 in connection with a printing cylinder 1, which is considerably smaller in diameter, on average.
  • a reducing intermediate piece 60 which is, for example, a rotationally symmetrical molded part made of copper, is arranged between the sleeve 40 and the pressure cylinder 1.
  • Contact elements 43, 43 ' are clamped between the sleeve 40 and the intermediate piece 60 as well as between the intermediate piece 60 and the pressure cylinder 1 and held together under elastic tension by the purely schematically indicated tensioning element 9.
  • the intermediate piece 60 is provided with an annular circumferential groove 61 which engages over the edge 62 of the trough 29.
  • the transition region between the end face 45 of the sleeve 40 and the end face 21 of the pressure cylinder 1, which is important for the current supply, is shown on an enlarged scale and in section in FIG. 5.
  • the end face 45 of the sleeve 40 receiving the contact element 43 has a groove 53 with obliquely converging flanks 54, while the contact element 43 has a semicircular bead 55 in cross section.
  • This and the selection of an elastically and / or plastically deformable, highly conductive material for the contact element 43 results in an excellent centering of the contact element 43 by the flanks 54, as well as a very strong double line contact, similar to a ball / cone fit between the bead 55 and the flanks 54. This results in an excellent current transfer with minimized resistances.
  • the corresponding parts can be produced easily and inexpensively and can be used repeatedly.
  • FIG. 7 shows the transition area between the sleeve 40 and the end face 21 of the pressure cylinder 1 with an elastic protective sleeve 56 pulled over it, which is equipped with a radial lip seal 58 to seal the rotary drive 3 inserted horizontally into the galvanizing trough 29 through a lateral opening 57.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Screen Printers (AREA)

Claims (10)

1. Dispositif pour la galvanisation d'un cylindre d'impression rotatif (1) qui comporte un mécanisme d'entraînement en rotation (3) conducteur de courant, relié à une source de courant (41) par l'intermédiaire de balais en carbone (6) et d'une bague collectrice (5) et auquel est relié, par l'intermédiaire d'un élément de serrage axial (9), le cylindre d'impression (1) qui plonge en mouvement de rotation en formant cathode, au moins partiellement, dans un bain de galvanisation (25), caractérisé en ce qu'il est prévu concentriquement un élément de serrage (9, 42), en avant du cylindre d'impression (1), un fourreau de forme cylindrique, conducteur de courant (40), qui est pourvu de la bague conductrice (5) dans sa zone arrière (40'), et en ce que le fourreau (40) s'applique par son côté frontal (45), au moyen d'une tension élastique engendrée par l'élément de serrage (9, 42) contre un élément de contact de forme annulaire (43), qui est lui-même en liaison avec le côté frontal (21) du cylindre d'impression (1) directement, ou bien en vue d'une compensation de différence de diamètres entre fourreau (40) et cylindre d'impression (1), par l'intermédiaire d'une pièce intercalaire (60) à axe de révolution et d'un autre élément de contact de forme annulaire (43').
2. Dispositif selon la revendication 1, caractérisé en ce que l'élément de contact (43) est réalisé en un métal élastiquement et/ou plastiquement déformable et possédant une résistance électrique aussi faible que possible.
3. Dispositif selon la revendication 2, caractérisé en ce que le métal est du cuivre pur, de l'argent, un alliage d'argent ou du plomb.
4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que le fourreau (40) s'applique contre le côté frontal (21) du cylindre d'impression (1) avec interposition d'au moins un élément de contact (43) de forme annulaire.
5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que l'élément de serrage (9, 42) est équipé d'un élément élastique (47).
6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que le fourreau (40) est reçu par un arbre creux (50) et est relié rigidement à celui-ci, qui comporte, de son côté, un palier tournant (51) et une roue d'entraînement (52).
7. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que, dans le cas d'un cylindre d'impression (1) comportant un tourillon (2) placé du côté frontal, on interpose, entre celui-ci et le fourreau (40) entourant le tourillon (2), des corps de centrage (48, 49) de forme annulaire.
8. Dispositif selon l'une des revendications 1 à 7, caractérisé en ce que le fourreau (40) comporte, sur le côté frontal (45) recevant l'élément de contact (43, 43'), une rainure de forme annulaire (53) ayant des flancs (54) se rejoignant en oblique et en ce que l'élément de contact (43) comporte, en section droite, un bourrelet (55) de forme demi-circulaire.
9. Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que la zone de passage du courant entre le fourreau (40) et le cylindre d'impression (1) est recouverte par une garniture protectrice (56) constituée d'un matériau élastique.
10. Dispositif selon l'une des revendications 1 à 9, caractérisé en ce que le fourreau (40) est pourvu, dans l'ouverture (57) montée dans la paroi de la cuve (29) recevant le bain de galvanisation (25) d'un joint d'étanchéité radial à lèvre (58) constitué d'une matière élastique.
EP82109855A 1981-12-19 1982-10-26 Dispositif pour l'électroplacage des rouleaux d'impression Expired EP0082268B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82109855T ATE18779T1 (de) 1981-12-19 1982-10-26 Vorrichtung zum galvanisieren eines rotationsdruckzylinders.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3150469 1981-12-19
DE3150469A DE3150469C2 (de) 1981-12-19 1981-12-19 Vorrichtung zum Galvanisieren eines Rotations-Druckzylinders

Publications (2)

Publication Number Publication Date
EP0082268A1 EP0082268A1 (fr) 1983-06-29
EP0082268B1 true EP0082268B1 (fr) 1986-03-26

Family

ID=6149237

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82109855A Expired EP0082268B1 (fr) 1981-12-19 1982-10-26 Dispositif pour l'électroplacage des rouleaux d'impression

Country Status (3)

Country Link
EP (1) EP0082268B1 (fr)
AT (1) ATE18779T1 (fr)
DE (1) DE3150469C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4236419C1 (de) * 1992-10-28 1994-01-13 Kaspar Walter Maschf Kg Spannvorrichtung für in einer galvanischen Anlage zu bearbeitende Tiefdruckzylinder

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3426628A1 (de) * 1984-07-19 1986-01-23 Max Frost KG, 4508 Bohmte Erdungskontakt zur uebertragung des stromes eines elektrisch betriebenen schienenfahrzeuges auf dessen radsatzwelle
US4659446A (en) * 1985-05-15 1987-04-21 Hallmark Cards, Inc. Apparatus for electroplating printing cylinders
CH666697A5 (de) * 1985-12-16 1988-08-15 Daetwyler Ag Vorrichtung zur galvanischen behandlung von druckzylindern.
FR2682525B1 (fr) * 1991-10-15 1994-01-14 Polimiroir Perfectionnement aux rouleaux conducteurs de courant notamment pour lignes d'electrolyse.
US7556722B2 (en) 1996-11-22 2009-07-07 Metzger Hubert F Electroplating apparatus
DE19901765C2 (de) * 1999-01-18 2001-01-11 Kaspar Walter Gmbh & Co Kg Tragvorrichtung für Druckzylinder und Spannvorrichtung dafür
US8298395B2 (en) 1999-06-30 2012-10-30 Chema Technology, Inc. Electroplating apparatus
DE102004033332A1 (de) * 2004-07-09 2006-02-09 Kaspar Walter Gmbh & Co. Kg Einspannvorrichtung für Druckzylinder
DE102006033449B3 (de) * 2006-07-19 2008-01-24 Kaspar Walter Gmbh & Co. Kg Einspannvorrichtung für Druckzylinder
CN107513743B (zh) * 2017-09-29 2023-11-24 德清县佳伟线缆有限公司 一种线缆镀铜机构

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE709161C (de) * 1940-02-08 1941-08-07 Elektrochem Fabrik Vorrichtung zum Verchromen von roehrenfoermigen Hohlkoerpern
JPS55164095A (en) * 1979-06-09 1980-12-20 Shinku Lab:Kk Method for plating on periphery of hollow roller and automatic detaching device for cassette type hollow roller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4236419C1 (de) * 1992-10-28 1994-01-13 Kaspar Walter Maschf Kg Spannvorrichtung für in einer galvanischen Anlage zu bearbeitende Tiefdruckzylinder

Also Published As

Publication number Publication date
EP0082268A1 (fr) 1983-06-29
ATE18779T1 (de) 1986-04-15
DE3150469C2 (de) 1985-02-07
DE3150469A1 (de) 1983-06-30

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